Nowadays, the scientific studies relating to natural dye sources in worldwide are quite extensive. In this context, natural dyeing refers to natural dyes in the fiber or to the dye source content. In this work, the saffron dye plant has been investigated. This plant is named Crocus sativus L. (Iridaceae) in Latin. The dye source in the plant is its stigma. Saffron is one of the most expensive dyes in the world. The colorants present in the plant are crocin and crocetin. These colorants can be used in natural dyeing. They are also investigated in terms of their dyeing properties.